Speed Stacks’ Gen4 StackMat timer accurately measures time to the thousandths decimal place. Even with that precision, Hyeon Jong Choi managed to stack the same exact 3-6-3 time twice, just 3 months apart. His time of 1.746 ties the current 3-6-3 world record. With this attempt, Hyeon Jong Choi now holds the top 3 fastest times in the category. The Korean stacker looks forward to defending his world champion and record holder title at the world championships in 2 weeks’ time.

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